IPTG；异丙基-β-D-硫代半乳糖苷

function sAlert(str) { var msgw, msgh, bordercolor; msgw = 400; //提示窗口的宽度 msgh = 100; //提示窗口的高度 titleheight = 25 //提示窗口标题高度 bordercolor = "#336699"; //提示窗口的边框颜色 titlecolor = "#99CCFF"; //提示窗口的标题颜色 var sWidth, sHeight; sWidth = document.body.offsetWidth; //浏览器工作区域内页面宽度 sHeight = screen.height; //屏幕高度（垂直分辨率） //背景层（大小与窗口有效区域相同，即当弹出对话框时，背景显示为放射状透明灰色） var bgObj = document.createElement("div"); //创建一个div对象（背景层） //定义div属性，即相当于 // bgObj.setAttribute("id", "bgDiv"); //alert("***********") bgObj.style.position = "absolute"; bgObj.style.top = "0"; bgObj.style.background = "#777"; bgObj.style.filter = "progid:DXImageTransform.Microsoft.Alpha(style=3,opacity=25,finishOpacity=75"; bgObj.style.opacity = "0.6"; bgObj.style.left = "0"; bgObj.style.width = sWidth + "px"; bgObj.style.height = sHeight + "px"; bgObj.style.zIndex = "10000"; document.body.appendChild(bgObj); //在body内添加该div对象 var msgObj = document.createElement("div")//创建一个div对象（提示框层） //定义div属性，即相当于 // msgObj.setAttribute("id", "msgDiv"); msgObj.setAttribute("align", "center"); msgObj.style.background = "white"; msgObj.style.border = "1px solid " + bordercolor; msgObj.style.position = "absolute"; msgObj.style.left = "50%"; msgObj.style.top = "50%"; msgObj.style.font = "12px/1.6em Verdana, Geneva, Arial, Helvetica, sans-serif"; msgObj.style.marginLeft = "-225px"; msgObj.style.marginTop = -75 + document.documentElement.scrollTop + "px"; msgObj.style.width = msgw + "px"; msgObj.style.height = msgh + "px"; msgObj.style.textAlign = "center"; msgObj.style.lineHeight = "25px"; msgObj.style.zIndex = "10001"; //alert("***********") var title = document.createElement("h4"); //创建一个h4对象（提示框标题栏） //定义h4的属性，即相当于 //

关闭

title.setAttribute("id", "msgTitle"); title.setAttribute("align", "right"); title.style.margin = "0"; title.style.padding = "3px"; title.style.background = bordercolor; title.style.filter = "progid:DXImageTransform.Microsoft.Alpha(startX=20, startY=20, finishX=100, finishY=100,style=1,opacity=75,finishOpacity=100);"; title.style.opacity = "0.75"; title.style.border = "1px solid " + bordercolor; title.style.height = "18px"; title.style.font = "12px Verdana, Geneva, Arial, Helvetica, sans-serif"; title.style.color = "white"; title.style.cursor = "pointer"; title.innerHTML = "关闭"; title.onclick = removeObj; var button = document.createElement("input"); //创建一个input对象（提示框按钮） //定义input的属性，即相当于 // button.setAttribute("type", "button"); button.setAttribute("value", "关闭"); button.style.width = "60px"; button.style.align = "center"; button.style.marginLeft = "250px"; button.style.marginBottom = "10px"; button.style.background = bordercolor; button.style.border = "1px solid " + bordercolor; button.style.color = "white"; button.onclick = removeObj; function removeObj() {//点击标题栏触发的事件 document.body.removeChild(bgObj); //删除背景层Div document.getElementById("msgDiv").removeChild(title); //删除提示框的标题栏 document.body.removeChild(msgObj); //删除提示框层 } document.body.appendChild(msgObj); //在body内添加提示框div对象msgObj document.getElementById("msgDiv").appendChild(title); //在提示框div中添加标题栏对象title var txt = document.createElement("p"); //创建一个p对象（提示框提示信息） //定义p的属性，即相当于 //

测试效果

txt.style.margin="1em 0" txt.setAttribute("id","msgTxt"); txt.innerHTML=str;//来源于函数调用时的参数值 document.getElementById("msgDiv").appendChild(txt);//在提示框div中添加提示信息对象txt document.getElementById("msgDiv").appendChild(button);//在提示框div中添加按钮对象button }