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3 回答 3

1

You can escape them with \

if (this.value == '') {
    this.value = 'I\'d be happy to make this introduction if possible. Contact me at your convenience.';
}
于 2013-07-18T16:53:24.627 回答
1

All you need is

Live Demo

window.onload=function() {
  var txtArea=document.getElementById("accept-response-text");
  txtArea.onfocus=function() {
    if (this.value === this.defaultValue) {
      this.value = '';
    }
  }
  txtArea.onblur=function() {
    if (this.value === '') {
      this.value = this.defaultValue;
    }
  }
}

UPDATE

Here is a version with placeholder and support for browsers without placeholders

Live Demo

function hasPlaceHolder() {
  var i = document.createElement('input');
  return 'placeholder' in i;
}    
window.onload=function() {
  var txt_area_accept = document.getElementById("accept-response-text");
  if (!hasPlaceHolder()) {
    txt_area_accept.defaultValue=txt_area_accept.getAttribute("placeholder");
    txt_area_accept.onfocus = function() {
      if (this.value === this.defaultValue) {
        this.value = '';
      }
    }
    txt_area_accept.onblur = function() {
      if (this.value === '') {
        this.value = this.defaultValue;
      }
    }
  }
}
于 2013-07-18T16:59:36.707 回答
1

The code you posted in your update is correct, except that for adding events you assign to the on​focus and on​blur, not just focus and blur.

That said, you should really be using the placeholder attribute instead of what you're currently using.

于 2013-07-18T17:52:29.260 回答