js代码

<script type="text/javascript">

	var thisColor,fontSize;

	$(function(){
		$('.fontSizeDiv a').on('click',function(){
			fontSize = $(this).attr('data-size');
			$('.fontSizeDiv a').removeClass('active');
			$(this).addClass('active');
		});

		$('a.colorHint').on('click',function(){
			$('.colorDiv').toggle();
		});

		$('.colorDivs a').on('click',function(){
			thisColor = $(this).attr('data-color');
			$('p.backColor').css({
				'background-color':'#'+thisColor
			});
			$('p.colorText').text('#'+thisColor);
		});
	});

	var ds = document.getElementById('ds');
	var dm = document.getElementById('dm');
	var rr = document.getElementById('rr');
	var st = document.getElementById('st');
	var dw = document.getElementById('dw');
	var num = 0;
	var pmh = ds.offsetHeight;
	var pmw = ds.offsetWidth;

	function mu()
	{
		var dd = document.createElement('div');
		dd.setAttribute('class','ss');
		dd.innerHTML = dm.value;
		dm.value='';
		ds.appendChild(dd);
		dd.style.fontSize = fontSize;
		dd.style.color = '#'+thisColor;
		dd.style.left = '900px';
		dd.style.top = Math.floor(Math.random()*(pmh-30))+'px';
		var l = pmw-dd.offsetWidth;
		var tim = null;
		tim = setInterval(function(){
	       l--;
	       if( l <= (0-dd.offsetWidth) ){
	       	clearInterval(tim);
	       	ds.removeChild(dd);
	       }
	       dd.style.left = l+'px';
		},20)
	}

	rr.onclick=function()
	{
		num++;
		if(num%2==0)
		{
			rr.style.background = '#006600';
			ds.style.display='block';
			num=0;
		}
		else
		{
			rr.style.background = '#dddddd';
			ds.style.display='none';
		}
	};
	st.onclick=function()
	{
	   if(dm.value!=''&&dm.value.length<=25)
		{
			mu();
		}
		else
	   {
		   alert('输入不能超过25个字符!');
	   }
	};
	document.onkeydown=function(even)
	{
		var event=even||window.event;
		if(event.keyCode==13)
		{
			if(dm.value!=''&&dm.value.length<=25)
			{
				mu();
			}
		}
	};
	dm.onclick=function()
	{
		  dw.style.display='none';
         setInterval(obj,10);
	};
	function obj()
	{
		if(dm.value!=''&&dm.value.length<=25)
		{
			st.style.background='#ffa178';
		}
		else
		{
			st.style.background='#00A2D6';
		}
	}

</script>