var isMSIE = /*@cc_on!@*/false; 

function chk_null(str){
	
	if (typeof str != "undefined" && str != null ){
		return 1;
	}else{
		return 0;
	}
}

function getElementsByClass(searchClass) {

   if (document.all) {
        var classElements = new Array();
        var allElements = document.all;
            for (i = 0, j = 0; i < allElements.length; i++) {
                if (allElements[i].className == searchClass) {
                    classElements[j] = allElements[i];
                    j++;
                }
            }   
   } else if (document.getElementsByTagName) {
        var classElements = new Array();
        var allElements = document.getElementsByTagName("*");
            for (i = 0, j = 0; i < allElements.length; i++) {
                if (allElements[i].className == searchClass) {
                    classElements[j] = allElements[i];
                    j++;
                }
            }       
   } else {
      return;
   }

    return classElements;
}

function create_param(param,param_name,param_val){

	if ( param ){ param+='&';}
	param+=param_name+'='+encodeURI(param_val);
	return param;
}