===== Instr =====
==== Format ====
**instr** ( //haystack// , //needle// )\\
**instr** ( //haystack// , //needle// , //start// )\\
**instr** ( //haystack// , //needle// , //start// , //caseinsensitive//)\\

==== Description ====
Check to see if the string //needle// is contained in the string //haystack//.  If it is, then this function will return the index of starting character of the first place where //needle// occurs.  Otherwise, this function will return 0.  You may also specify an optional starting location for the search to begin //start// and a boolean value //caseinsensitive// to specify that the search will treat upper and lower case letters the same.
==== Note ====
String indices begin at 1.
==== Example ====
<code>
print instr("Hello", "lo")
print instr("101,222,333",",",5)
</code>
will display
<code>
4
8
</code>

==== Version ==== 
0.9.6.55
