How can I replace Space with %20 in javascript?

replace replace("","%20"); with replace(/ /g,"%20");

http://www.w3schools.com/jsref/jsref_replace.asp

sParameter = encodeURIComponent(sParameter.trim()) //"Test%20-%20Text"

the .trim will remove leading and trailing whitespace from the string. encodeURIComponent will URL-encode it.

 sParameter = encodeURIComponent(sParameter.trim())

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