Word existence

[Disk-t]

How do I check if a certain word exists in a text box? For example, if I set the word to be found to "word1", if the text box is "This is word1", and alert would come up saying that "word1" was found.

[creole]

if (formname.elementname.value == "string")

should do it. Someone please let me know if that is incorrect.

[oblig]

I think that checks to see if the text in the textbox is identical to
string.

To see if the word exists inside a string, I think you'll need something like indexOf().

Not sure about the syntax, but it's something like:

if (formname.elementname.value.indexOf("string") != -1) 
{
alert("string was found in textbox")
}