/*
 *	Check empty value
 */
function isEmpty(val){
	if(val == null || val == ""){
		return true;
	}
	return false;
}

/*
 *	Get file name from file path
 */
function getFileName(sPath){
	if(!isEmpty(sPath)){
		sPath = sPath.replace('/', '\\');
		var iPos = sPath.lastIndexOf('\\');
		if(iPos != -1){
			return sPath.substr(iPos + 1, sPath.length);
		}
		return sPath;
	}
	return "";
}

/*
 * Check maxlength for textarea
 */  
function imposeMaxLength(Object, MaxLen){
  return (Object.value.length <= (MaxLen-1));
}

/*
 * Set value of Object HTML with MAX length of data
 */
function maxLength(Object){
	var iLength = Object.getAttribute ? parseInt(Object.getAttribute("maxlength")) : 0;
	if(Object.getAttribute && Object.value.length > iLength){
		Object.value = Object.value.substring(0, iLength);
	}
}

/**
 * Author: Thao tran
 * break line a string 
 * @param: strContent: string value, intMax: max lenght
 * @return: new string
 * */
function wordWrap(sContent, iMax){
	var sTemp = "";
	while(sContent.length > iMax){
        	sTemp   += sContent.substr(0, iMax) + "<br>";  
        	sContent = sContent.substr(iMax, sContent.length);  
    }
	sTemp += sContent;
	return sTemp;
}

/**
  * Author: Thao tran
  * Cut the spaces at the left and the rigth of a string
  * @param - sStr to be trimmed
  * @return - trimmed string
  * **/
function Trim(sStr){
	while (sStr.charCodeAt(0) <= 32){
    	sStr=sStr.substr(1);
    }
	while (sStr.charCodeAt(sStr.length - 1) <= 32){
		sStr=sStr.substr(0, sStr.length - 1);
	}
	return sStr;
}

/**
  * Author: Thao tran
  * check numeric
  * @param - sStr
  * @return - true is ok; else false
  * **/
function isNumeric(str){
	if(isEmpty(str)){
    	return false;
    }
    for(var i = 0, len = str.length; i < len; i++){
        var ch = str.charAt(i);
        if(isNaN(parseInt(ch))){
            return false;
		}
    }
    return true;
}
/**
* check sign selection for chekcbox or radio button
* @param - arrField, value
* **/
function optSelect(arrField, value){
	for(var i=0; i < arrField.length; i++){    	
    	if(arrField[i].value == value){
        	arrField[i].checked = true;
        }
	}
}

/** Check undefined html object
  * 
  * Author: LE THANH PHONG
  * @param - object id
  * @return - true is ok; else false
  * **/
function isExistObjectHTML(ob_id){
	if(document.getElementById(ob_id)!=null){
		return true;
	}
	return false;
}

/** Set inner data for an html object
  * 
  * Author: LE THANH PHONG
  * @param - object id, value
  * @return - none
  * **/
function setInnerHTML(ob_id, value){
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).innerHTML = value;
	}
}

/** Get inner data of an html object
  * 
  * Author: LE THANH PHONG
  * @param - object id, value
  * @return - none
  * **/
function getInnerHTML(ob_id){
	if(isExistObjectHTML(ob_id)){
		return document.getElementById(ob_id).innerHTML;
	}
	return "";
}

/** Set data for an html object
  * 
  * Author: LE THANH PHONG
  * @param - object id, value
  * @return - none
  * **/
function setValueHTML(ob_id, value){
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).value = value;
	}
}

/** Get data of an html object
  * 
  * Author: LE THANH PHONG
  * @param - object id
  * @return - value
  * **/
function getValueHTML(ob_id){
	if(isExistObjectHTML(ob_id)){
		return document.getElementById(ob_id).value;
	}
	return "";
}

/** Show inner data of an html object
  * 
  * Author: LE THANH PHONG
  * @param - object id
  * @return - none
  * **/
function visible(ob_id){		
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).style.display = "block";
	}
}

/** Hide inner data of an html object
  * 
  * Author: LE THANH PHONG
  * @param - object id
  * @return - none
  * **/
function invisible(ob_id){
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).style.display = "none";
	}
}

/** Refresh page
  * 
  * Author: LE THANH PHONG
  * @param - none
  * @return - none
  * **/
function refreshPage(){
	window.location.reload();
}

/** Disappear box 
  * Author: LE THANH PHONG
  * @param - none
  * @return - none
  * */

function scrollUp(obj, hMax, hMin){
	
	var reduce_height_by  = 8;
	var rate = 10;	// 15 fps
	
	if(hMax > 0){
		hMax -= reduce_height_by;
		if(hMax < 0) hMax = 0;
		obj.style.height = hMax + "px";
	}
	
	if(hMax > 0 && hMax > hMin){
		setTimeout(function() { scrollUp(obj, hMax, hMin); }, rate);
	}
}

function scrollDown(obj, hMax, hMin){
	
	var increase_height_by  = 8;
	var rate = 10;	// 15 fps
	
	if(hMax > hMin){
		hMin += increase_height_by;
		if(hMax < hMin) hMin = hMax;
		obj.style.height = hMin + "px";
	}
	
	if(hMax > hMin){
		setTimeout(function() { scrollDown(obj, hMax, hMin); }, rate);
	}
}

/** Set CSS Class for an object */
function setClassName(ob_id, className){
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).className = className;
	}
}

/** Set focus on an object HTML */
function setFocusHTML(ob_id){
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).focus();
	}
}

/** Hide loading bar */
function removeLoading(){
	alert();
	var targelem = document.getElementById('percents');
	if(targelem != null){
		targelem.style.display='none';
		targelem.style.visibility='hidden';
	}
}

/** Change Image */
function ci(ob_id, newImageSrc){
	if(isExistObjectHTML(ob_id)){
		document.getElementById(ob_id).src = newImageSrc;
	}
}