function check_playid() {
	if($("input.playid").val()==''){
		alert('请输入DJ编号');
		return false;
	}else{
		window.open('/dj/' + $("input.playid").val() + '.htm','play');
	}
}

$(document).ready(function() { 

$("input.play_btn").hover( 
function () { 
$(this).attr("src","/picture/play_btn_hover.gif"); 
}, 
function () { 
$(this).attr("src","/picture/play_btn.gif"); 
} 
); 
});