Javascript Regular Expression for removing a "-" in first position of a word?

I need the Javascript Regular Expression for removing a "-" in first position of a word?

For example, how would I remove the "-" from "-MyTest".  I only need to remove the dash if it is in the first position.  
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<script type="text/javascript">
  var re = /^-/;
  var sourcestring = "-source string to match with pattern";
  var result = sourcestring.replace(re, "");
  alert("result = " + result);

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You don't need a regular expression for this.

if ( sourcestring !=null && sourcestring.length > 1 && sourcestring.startsWith("-") ) {
  sourcestring = sourcestring.substring(1);
StartsWith is a prototype.
sourcestring = (sourcestring.substr(0,1)=='-' ) ? sourcestring.substring(1):sourcestring;

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Thanks for the question and the points.
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Regular Expressions

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