$().ready(function() {
    	$('#type').val('all');
});

	var check=0;
    function set_show(event){
    	var object;
        check=1;
		$('#selectType').css("display","block");
	    try{
			if (event.target) {//Mozilla
				object = event.target;
 				event.cancelBubble=true;//阻止传递
			}
			else if(event.srcElement){//IE
				object = event.srcElement;
 				event.cancelBubble=true;//阻止传递
			}
		}catch(e){
			alert(e);
		}
	}
	function set_type(type){
		if(type=='all')
		{
    		$('#defaultst').css("background","#F3FFFF url(images/search.gif) no-repeat center center");
    		$('#type').val('all');
		}
		else {
			$('#defaultst').css("background","#F3FFFF url(images/types_"+type+".gif) no-repeat center center");
			$('#type').val(type);
		}
    	$('#selectType').css("display","none");
	}
	function hide(){
		if(check=1) {
			$('#selectType').css("display","none");
		}
	}

    function search_restoration()
    {
        if($('#search_keyword').val() == '')
        {
            $('#search_keyword').val("Please enter a key word");
        }
    }
    function search_clear()
    {
       if ($('#search_keyword').val() == "Please enter a key word")
       {
            $('#search_keyword').val('');
       }
    }
	function checkSearch()
    {
            if($('#search_keyword').val() == '' || $('#search_keyword').val() == "Please enter a key word")
            {
                alert("Key words can not be empty");
                $('#search_keyword').focus();
                $('#search_keyword').val('');
                return false;
            }
    }