javascript 清除文本框值 onclick 并显示 onblur
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Clearing the textbox values onclick and displaying onblur
提问by Aayush Aarwal
Is there a way to clear the default textbox value onclick on textbox and display onblur of multiple textboxes on form page?
有没有办法清除文本框上的默认文本框值并在表单页面上显示多个文本框的模糊?
采纳答案by Waruna Manjula
function Clear1(str)
{
document.getElementById(str).value= "";
}
function Clear2(str2)
{
var aa1=document.getElementById(str2);
if (aa1.value==""){
document.getElementById(str2).style.backgroundColor = "#ffcccc";
}else{
document.getElementById(str2).style.backgroundColor = "#ffffff";
}
}
<input type="text" value="test1" onClick="Clear1(this.id);" id="textbox1" onblur="Clear2(this.id);">
<input type="text" value="test2" onClick="Clear1(this.id);" id="textbox2" onblur="Clear2(this.id);">
<input type="text" value="test3" onClick="Clear1(this.id);" id="textbox3" onblur="Clear2(this.id);">
<input type="text" value="test4" onClick="Clear1(this.id);" id="textbox4" onblur="Clear2(this.id);">
回答by notknown7777
HTML:
HTML:
<input type="text" value="" onClick="Clear();" id="textbox1>
<input type="text" value="" onClick="Clear();" id="textbox2>
<input type="text" value="" onClick="Clear();" id="textbox3>
<input type="text" value="" onClick="Clear();" id="textbox4>
Javascript :
Javascript :
function Clear()
{
document.getElementById("textbox1").value= "";
document.getElementById("textbox2").value= "";
document.getElementById("textbox3").value= "";
document.getElementById("textbox4").value= "";
}
Your question was a little vague to me, but the above will clear all the textboxes when one is clicked. Hopefully this helps you.
你的问题对我来说有点含糊,但是当点击一个时,上面会清除所有的文本框。希望这对你有帮助。
回答by Bellash
One Line solution
单线解决方案
<input type="text" value="" onClick="this.value='';" id="textbox1">
or
或者
<input type="text" value="" onClick="this.value=='Initial Text'?this.value='':this.value;" id="textbox1">