function onClickSearch(){
	keySearch = document.forms.frm_search_google.search.value;
	if (keySearch == "Từ khóa tìm kiếm" || keySearch == "") {
			alert('Vui lòng nhập từ khóa tìm kiếm');			
			document.forms.frm_search_google.search.value = "";
			document.forms.frm_search_google.search.focus();
			return false;
	}

	var radioLength = document.forms.frm_search_google.dmain.length;
	var dmain = 'quangcaosanpham.com';
	for(var i = 0; i < radioLength; i++) {
		if(document.forms.frm_search_google.dmain[i].checked) {
			dmain =  document.forms.frm_search_google.dmain[i].value;
		}
	}
	if (dmain == 'muabanraovat.com') {
		imgStr = 'www.muabanraovat.com%2Fimages%2FimgSearchMBRV.gif';
	} else if (dmain == 'quangcaosanpham.com') {
		imgStr = 'www.quangcaosanpham.com%2Fimages%2FimgSearchQCSP.gif';
	} else if (dmain == 'timsanpham.com'){
		imgStr = 'www.timsanpham.com%2Fimages%2FimgSearchTSP.gif';
	} else if (dmain == 'raovatdidong.vn') {
		imgStr = 'www.raovatdidong.vn%2Fimages%2FimgSearchRVDD.gif';
	} else if (dmain == 'maytinh360.vn') {
		imgStr = 'www.maytinh360.vn%2Fimages%2FimgSearchMT360.gif';
	} else if (dmain == 'raobandomain.com') {
		imgStr = 'www.raobandomain.com%2Fimages%2FimgSearchRBDM.gif';
	}	
	//linkStr ='http://www.google.com/custom?hl=vi&cof=L%3Ahttp%3A%2F%2F'+imgStr+'%3B&sitesearch='+dmain+'&btnG=Search&q='+document.forms.frm_search_google.search.value;
	linkStr ='http://www.google.com/custom?hl=vi&sitesearch='+dmain+'&btnG=Search&q='+document.forms.frm_search_google.search.value;
	window.open(linkStr,'Tìm kiếm');
	
}
function checkSubmit() {
	onClickSearch();
	return false;
}