function search(url) {
	var keywords = '';
	if ($("#keywords").val()=='请输入关键字' || $("#keywords").val()=='') {
		$("#keywords").val("请输入关键字");
		keywords = '';
		alert("请输入搜索关键字");
		return ;
	} else {
		keywords = $("#keywords").val(); 
	}
	if ($("#search_type").val() == 1) {
		 window.open(url+"/search/search.html?type=1&q=" + keywords);
	} else if ($("#search_type").val() == 2) {
	     window.open(url+"/search/search.html?type=2&q=" + keywords);
	} else if ($("#search_type").val() == 3) {
	     window.open(url+"/search/search.html?type=3&q=" + keywords);
	} else {} 
}
function keywordClick() {
	if ($("#keywords").val() == '请输入关键字') {
		$("#keywords").val("");
	}
}
function keywordBlur() {
	if ($("#keywords").val() == '') {
		$("#keywords").val("请输入关键字");
	}
}
document.onkeydown=OnKeyDown   
function OnKeyDown(){
	if(event.keyCode==13){//表示按下回车键
		if ($("#keywords").get(0) == document.activeElement) {
			search();
		}
	} 
}