function trim(a){
	var tmp=new Array();
	for(j=0;j<a.length;j++)
		if(a[j]!='')
			tmp[tmp.length]=a[j];
	a.length=tmp.length;
	for(j=0;j<tmp.length;j++)
		a[j]=tmp[j];
	return a;
}

function validatePDF(strFilePath){
	
	var strExt = strFilePath.split("."); 
	var blnReturn = false;
	
	if (strExt.length == 2) {
  	
  	strExt[1] = strExt[1].toString().toLowerCase();
  	if( strExt[1] == "pdf"){
    	blnReturn = true;
    }
  }
	
	return blnReturn;
}

function validateDOC(strFilePath){
	
	var strExt = strFilePath.split("."); 
	var blnReturn = false;
	
	if (strExt.length == 2) {
  	
  	strExt[1] = strExt[1].toString().toLowerCase();
  	if( strExt[1] == "doc"){
    	blnReturn = true;
    }
  }
	
	return blnReturn;
}


function replaceSubstring(inputString, fromString, toString) {
	var temp = inputString;
	if (fromString == "") {
	  return inputString;
	}
	if (toString.indexOf(fromString) == -1) { 
	  while (temp.indexOf(fromString) != -1) {
	     var toTheLeft = temp.substring(0, temp.indexOf(fromString));
	     var toTheRight = temp.substring(temp.indexOf(fromString)+fromString.length, temp.length);
	     temp = toTheLeft + toString + toTheRight;
	  }
	} else { 
	  var midStrings = new Array("~", "`", "_", "^", "#");
	  var midStringLen = 1;
	  var midString = "";
	
	  while (midString == "") {
	     for (var i=0; i < midStrings.length; i++) {
	        var tempMidString = "";
	        for (var j=0; j < midStringLen; j++) { tempMidString += midStrings[i]; }
	        if (fromString.indexOf(tempMidString) == -1) {
	           midString = tempMidString;
	           i = midStrings.length + 1;
	        }
	     }
	  }
	  while (temp.indexOf(fromString) != -1) {
	     var toTheLeft = temp.substring(0, temp.indexOf(fromString));
	     var toTheRight = temp.substring(temp.indexOf(fromString)+fromString.length, temp.length);
	     temp = toTheLeft + midString + toTheRight;
	  }
	  while (temp.indexOf(midString) != -1) {
	     var toTheLeft = temp.substring(0, temp.indexOf(midString));
	     var toTheRight = temp.substring(temp.indexOf(midString)+midString.length, temp.length);
	     temp = toTheLeft + toString + toTheRight;
	  }
	}
	return temp;
}