浅谈javascript中的三种弹窗
js中三种弹窗
1)alert弹出警告无返回值---------alert('第一行\n第二行');
2)confirm()选择确定或取消,返回t或f----varresult=confirm('是否删除!');
3)prompt()弹出输入框,返回输入内容----varvalue=prompt('输入你的名字:','请在这里输入名字');
当然也可以自定义好看的样式。下面代码有问题明天再改。
<script>
//window.confirm
//prompt
window.alert=function(title,str)
{
varshield=document.createElement("DIV");
shield.id="shield";
shield.style.position="absolute";
shield.style.left="0px";
shield.style.top="0px";
shield.style.width="100%";
shield.style.height=document.body.scrollHeight+"px";
//弹出对话框时的背景颜色
shield.style.background="#fff";
shield.style.textAlign="center";
shield.style.zIndex="25";
//背景透明IE有效
//shield.style.filter="alpha(opacity=0)";
varalertFram=document.createElement("DIV");
alertFram.id="alertFram";
alertFram.style.position="absolute";
alertFram.style.left="50%";
alertFram.style.top="50%";
alertFram.style.marginLeft="-225px";
alertFram.style.marginTop="-75px";
alertFram.style.width="450px";
alertFram.style.height="150px";
alertFram.style.background="#ff0000";
alertFram.style.textAlign="center";
alertFram.style.lineHeight="150px";
alertFram.style.zIndex="300";
strHtml="<ulstyle=\"list-style:none;margin:0px;padding:0px;width:100%\">\n";
strHtml+="<listyle=\"background:#DD828D;text-align:left;padding-left:20px;font-size:14px;font-weight:bold;height:25px;line-height:25px;border:1pxsolid#F9CADE;\">"+title+"</li>\n";
strHtml+="<listyle=\"background:#fff;text-align:center;font-size:12px;height:120px;line-height:120px;border-left:1pxsolid#F9CADE;border-right:1pxsolid#F9CADE;\">"+str+"</li>\n";
strHtml+="<listyle=\"background:#FDEEF4;text-align:center;font-weight:bold;height:25px;line-height:25px;border:1pxsolid#e85727;\"><inputtype=\"button\"value=\"确定\"onclick=\"doOk()\"/></li>\n";
strHtml+="</ul>\n";
alertFram.innerHTML=strHtml;
document.body.appendChild(alertFram);
document.body.appendChild(shield);
varad=setInterval("doAlpha()",5);
this.doOk=function(){
alertFram.style.display="none";
shield.style.display="none";
}
alertFram.focus();
document.body.onselectstart=function(){returnfalse;};
}
</script>
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