function getFileExtension(file){
	var  extArr = Array("jpg","jpeg","mov","avi","mpg","mpeg","3gp","wmv","flv");
	var tmpArr = "";
	tmpArr = file.split(".");
	var	 ext = tmpArr[tmpArr.length-1].toLowerCase();
	var i;
	for(i=0;i < extArr.length;i++){
			if(ext == extArr[i].toLowerCase()){
					return  true;
					break;
			}
	}
	return false;
}

function stripHTML(){
var re= /<\S[^><]*>/g
for (i=0; i<arguments.length; i++){
arguments[i].value=arguments[i].value.replace(re, "");
}
document.form_main_search.TagId.value = trimString(document.form_main_search.TagId.value);
if(document.form_main_search.TypeId.value==4){
		if(document.form_main_search.TagId.value.length <3 ){
				alert("กรุณาใส่คำที่ต้องการค้นหาตั้งแต่ 3 พยางค์ขึ้นไป");
				return false;
		}
}
return true;
}

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

}