默认选中搜索焦点

app/html/search-home.html

		 var selectblock = document.getElementById("div_select");
		 var searchVal = document.getElementById("searchval");
		 var key,bigClass=1;
		 searchVal.focus();
	    /*搜专家搜资源的下拉选择框*/
		selectblock.addEventListener('tap', function() {
			showblock.style.display = 'block';