第二种生成验证码的jsp代码

				 
				
				
				
				
				jsp生成彩色汉字验证码
				
				
				function my()
				{
				   if(document.form1.rand.value=="")
					{
						alert("请输入验证码！");
						return;
					}
					else
					{
					document.form1.submit(); 
					}
				}
				
				function Refresh() 
				 {
					var ccImg = document.getElementById("checkCodeImg");
					var ccImgSrc = "";
					if (ccImg) 
						{
							if (document.all) 
							{
								ccImgSrc = "image.jsp";
							} 
							else
							{
								nowTime = new Date()
								ccImgSrc = "image.jsp" + nowTime.getTime();
							}
							ccImg.src = ccImgSrc;
					    }
				}
				
				
				
				
				
				  
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