function trim(str){
return str.replace(/^\s+|\s+$/g,''); }


function UploadOnChange(FileName) {
	strfile = FileName.value; 
	strExt = strfile.substr(strfile.lastIndexOf(".")+1,3); 


	if(strExt!="pdf") { 	
	alert("Please upload PDF file");	
	FileName.focus();
	return false;
	}
}