Centering Text over Image - html

Question

Here's my summarized code
HTML:
<div class="wrap">
<div>
<img src="Pictures/titlepic.jpg" width="1035" height="200">
<h1 class="text_over_image">Welcome to my Sandbox</h1>
</div>
</div>
CSS:
.wrap{
width: 1060px;
margin: auto;
}
.text_over_image{
position: absolute;
top: 20px;
}
I've tried left: 50%, text-align:center, any number of things with no great luck. I didn't want to do a left: 50px (or whatever the value needs to be) as whats unseen is that the length of the text changes depending on Javascript values. So the title could be short, or long and I want it to center no matter what.
Ideas?

Answer 1

Try the following css:
.text_over_image{
position: absolute;
top: 0;
left:0;
right:0;
bottom:0;
}
===Edit ===
.wrap {
width: 1060px;
height:auto;
margin: auto;
text-align:center;
position:relative;
}
.text_over_image {
position: absolute;
margin: auto;
top: 0;
left:0;
right:0;
bottom:0;
color:#fff;
height:100px;
}
There you go JsFiddle

Answer 2

div.counter {
position: relative;
display: inline-block;
}
div.counter span {
position: absolute;
text-align: center;
height: 100%;
width: 100%;
}
div.counter span:before {
display: inline-block;
vertical-align: middle;
height: 100%;
content: '';
}
<div class="counter">
<span>TEXT</span>
<img src="http://placehold.it/100x100"/>
</div>

Answer 3

HTML
<div class="wrap">
<div>
<h1 class="text_over_image">Welcome to my Sandbox</h1>
</div>
</div>
CSS
.wrap
{
background-image:url(Pictures/titlepic.jpg);
width:1035px;
height:200px;
}
.text_over_image
{
text-align:center;
line-height:200px;
}